You may want to remove wax or any other protective coating from the surface of your car if it needs paint repairs for instance or if you simply want to replace the current protection with another product to provide better durability or a higher quality of finish. The most thorough and effective way to completely remove car wax or any other protection is to clay the paintwork. This ensures that anything on the surface is fully removed leaving only the bare paintwork.
You should first thoroughly wash the car to remove any loose contaminants and dirt then fully clay it from top to bottom, working a section at a time. After claying, the car should be rewashed or at least thoroughly re rinsed to remove any reside. Using the claying method to remove car wax and protection ensures that the surface is completely free from any other contaminants and will therefore ensure that any new protection that is applied will bond well to the surface.
If you do not have time, or for whatever reason cannot clay your car to fully remove the wax/protection then you should wash the car with strong products to help break down and remove it. You should use a shampoo that does not contain any waxes and ensure you use a good amount of it when mixing the solution to ensure it has the desired effect.
Before washing you should pre treat the whole car with either a diluted all purpose cleaner or a designated traffic film remover product and allow to dwell, ensure that this is only done in a cool shaded area to prevent the products from drying on the surface. After they have been allowed to dwell for a few moments you should thoroughly rinse off the car to remove any product residue before washing.
You should be able to tell if the car wax has been effectively removed when finally rinsing the car because the water will no longer bead up and quickly run off the surface but instead remain on it as a complete body of water. Depending on the level and quality of the car wax that was initially applied you may need to repeat this process in order to ensure that the wax/protection is entirely removed.